Cheapest 4TB Hard Drives (2026)
Four terabytes is the entry point for serious storage, large enough for a decent media library or a full system backup without costing what a NAS-sized drive costs. I track every 4TB HDD listing on Amazon.com and rank them by price so you find the cheapest option available right now.
Is 4 TB enough?
4 TB holds around 800 hours of HD video, 1 million photos, or roughly 60 modern games. For a single-drive backup or media storage, it is plenty. For a NAS or growing collection, consider 8 TB for better long-term value per TB.
Quick Verdict
- Who this is for
- Budget storage buyers, first-time NAS builders, backup users, and anyone who needs a simple, affordable drive.
- What usually wins
- The cheapest new 4 TB internal HDD for desktop or NAS use. An external 4 TB portable for plug-and-play backup.
- Prioritise
- Lowest total price. At 4 TB the price-per-TB premium is higher than larger drives. Check if an 8 TB drive offers better value per TB for your use case.
Prices updated daily from Amazon.com. All links go directly to the retailer. Details.
Bottom line: the lowest price-per-TB pick on this page right now is the HP 3.5-Inch 4000 GB Hot-Swap 2 MB Cache Internal Hard Drive 693687-B21, 4 TB new, at $95.18 ($23.80/TB) on Amazon.com. Check the current price.
Cheapest 4TB Internal HDDs
New 4 TB internal hard drives at the lowest prices. Standard desktop drives with full manufacturer warranty.
HUS726040ALS210 HGST 4TB 7.2K 12G LFF SAS Hard Drive
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
HP 3.5-Inch 4000 GB Hot-Swap 2 MB Cache Internal Hard Drive 693687-B21
HP 693689-S21 - 693689-B21 HP 4TB 7.2K SAS 6G DP HARD DRIVE
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
HP 693689-B21 4TB 7.2K 6G 3.5IN SAS MDL HDD - 693721-001, 695510-B21
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
Dell 202V7 4tb 3.5in 7.2k NL SAS 6gbs Hard Drive
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
IBM 4 TB 3.5" Internal Hard Drive
4TB 7200rpm 6Gbps SAS 3.5-inch Drive Compatible 342-5295
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
Western Digital Re 4TB SAS Datacenter Capacity Hard Drive 3.5 inch 7200 RPM 32MB Cache | WD4001FYYG |
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
Cheapest 4TB External HDDs
Plug-and-play 4 TB external drives. Portable and desktop externals for easy backup without opening your PC.
ModusTech Desktop External Hard Drive (NOT-Portable) — Vault USB-C 3.1 (5Gbps) High-Speed HDD for PC, Mac, Laptop & Console, Mains-Powered Backup Storage, 2-Year Warranty (4.0, TB, Vault-Alloy)
Avolusion PRO-T5 Series 4TB USB 3.0 External Gaming Hard Drive for PS5 Game Console (White) - 2 Year Warranty
Avolusion T8 Series 4TB USB 3.0 External Gaming Hard Drive for PS5 Game Console (Black) - 2 Year Warranty
Avolusion PRO-T5 4TB USB 3.0 External Hard Drive for Windows & Mac OS (White) - 2 Year Warranty
BUSlink XP Compliant BUS-POWERED USB 3.0 External Portable Hard Drive for All OS (4TB)
Buslink DBP-4T-U3S USB Powered USB 3.0/eSATA Portable Hard Drive (4TB)
Western Digital WD Drive Plus 4TB 2.5" USB3.2 Gen1 Silicon Grey
Seagate Expansion Desktop, 4TB, External Hard Drive, USB 3.0 (STKP4000400)
Cheapest Refurbished 4TB HDDs
Recertified 4 TB drives at bargain prices. Enterprise pulls and refurbished units with seller warranties.
HUS726040ALS210 HGST 4TB 7.2K 12G LFF SAS Hard Drive
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
MDD MAXDIGITALDATA 4TB 7200RPM 128MB Cache SAS 12Gb/s 3.5inch Internal Enterprise Hard Drive (MD4TSAS12872E) - [ Not a SATA HDD ] (Renewed)
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
SEAGATE ST4000NM0023 Constellation ES.3 4TB 7200 RPM 128MB cache SAS 6.0Gb/s 3.5 internal hard drive (Bare Drive) (Renewed)
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
Pulled 529FG ST4000NM0023 4TB 3.5 7.2K 6Gb SAS Hard Drive
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
HP 695842-001 4TB SAS Hard Drive Disk (HDD) - 7,200 RPM, 3.5-inch form factor, SmartDrive Carier (SC), Midline (MDL), 6Gb per second Transfer Rate (TR)
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
Western Digital Re 4TB SAS Datacenter Capacity Hard Drive 3.5 inch 7200 RPM 32MB Cache | WD4001FYYG |
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
TOSHIBA 4TB HDD 7.2K RPM 3.5" 12Gb/s SAS Hard Disk Drive Model: MG04SCA40ENY DP/N: 1MVTT
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
HP 693689-S21 - 693689-B21 HP 4TB 7.2K SAS 6G DP HARD DRIVE
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
How to Choose
Buying a 4 TB drive is straightforward. Here are the key decisions.
Internal vs external
Internal 3.5" drives are cheaper and fit desktop PCs and NAS enclosures. External drives cost more but require zero setup, just plug in via USB.
4 TB vs 8 TB
Check the price-per-TB of both sizes before buying. Often the 8 TB drive is only 30–50% more expensive but offers twice the space. Making it significantly cheaper per TB.
Brand and warranty
Stick with Seagate, WD, or Toshiba for manufacturer warranties (2–5 years). Off-brand drives may be cheaper but lack reliable support.
Use case
For 24/7 NAS use, consider a NAS-rated drive even at 4 TB. For occasional backup or desktop storage, any standard drive is fine.
Frequently Asked Questions
How much does a 4 TB hard drive cost?
4 TB pricing shifts with deals, so rather than quote a figure that ages badly, the table on this page ranks every live Amazon US 4 TB listing by price and refreshes daily — check it on the day you buy. Worth knowing: at 4 TB the price-per-terabyte premium is higher than on larger drives, so compare $/TB against an 8 TB before you commit.
Is 4 TB enough storage?
4 TB holds roughly 800 hours of HD video, about a million photos, or around 60 modern games — plenty for a single-drive backup or a modest media collection. For a NAS or a fast-growing library, step up to 8 TB, which usually costs only 30–50% more for twice the space and a lower price per terabyte.
Is a 4 TB or an 8 TB drive better value?
Almost always the 8 TB on a per-terabyte basis. An 8 TB drive is often only 30–50% more expensive than a 4 TB but gives you double the capacity, so the cost per terabyte is meaningfully lower. Buy 4 TB when you specifically want the lowest total outlay or the smaller capacity fits; check both sizes’ $/TB on this page and our cheapest-per-TB table first.
Should I get an internal or external 4 TB drive?
Internal 3.5-inch drives are cheaper and fit desktop PCs and NAS enclosures. External 4 TB portables cost more but need zero setup — just plug in over USB. Choose internal for the lowest price or for a NAS; choose external for grab-and-go backup.
Which brand should I buy at 4 TB?
Stick with Seagate, WD, or Toshiba for a real 2–5 year manufacturer warranty and reliable support. Off-brand drives can be a little cheaper but often lack proper warranty coverage. For 24/7 NAS use, consider a NAS-rated model (IronWolf, WD Red) even at 4 TB; for occasional backup or desktop storage, a standard drive is fine.
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